Adhesive sheet for printing and label

Abstract

Disclosed are (1) an adhesive sheet for printing comprising a layer to be printed having no release coat, and at least an adhesive layer having an adhesive strength of 1 to 5000 gf/50 mm to the layer to be printed, and (2) a label having a heat transfer pattern comprising a heat fixing ink comprising a polyolefin and a colorant on the layer to be printed of the adhesive sheet for printing.

What is claimed is: 
     
       1. An adhesive sheet for printing comprising (i) a layer to be printed in which a surface portion is formed of a polyolefin layer, and (ii) an adhesive layer adhering to said layer to be printed, said adhesive sheet having the following elements: (1) a polyolefin polymer constituting the polyolefin layer has a density of 0.94 g/cm 3  or less;   (2) the layer to be printed has no release coat;   (3) the layer to be printed has a mean square roughness of 0.4 μm or less at a surface thereof;   (4) an adhesive strength when the adhesive sheet is wound to form a wound product and then unwound at a speed of 5 m/minute is 5,000 gf/50 mm; and   (5) an adhesive strength when the adhesive sheet is wound to form a wound product and then unwound at a speed of 5 m/minute after standing at 70° C. for 96 hours is 5 to 4,000 gf/50 mm.   
     
     
       2. The adhesive sheet for printing according to claim 1, wherein the layer to be printed contains a releasing polymer. 
     
     
       3. A label having a heat transfer pattern comprising a heat fixing ink comprising a polyolefin and a colorant on the layer to be printed of the adhesive sheet for printing according to claim 2. 
     
     
       4. The adhesive sheet for printing according to any one of claims 1 to 2, wherein the adhesive layer is formed of at least one of a urethane adhesive, a polyester adhesive and a polyamide adhesive. 
     
     
       5. A label having a heat transfer pattern comprising a heat fixing ink comprising a polyolefin and a colorant on the layer to be printed of the adhesive sheet for printing according to claim 4. 
     
     
       6. The adhesive sheet for printing according to claim 1, which has an adhesive strength of 10 gf/50 mm to 1500 gf/50 mm when the adhesive sheet is wound to form a wound product and the unwound at a speed of 5 m/minute after standing at 70° C. for 96 hours. 
     
     
       7. The adhesive sheet for printing according to any one of claims 2, 6 or 1, wherein a reinforcing substrate and a viscoelastic material layer are placed between the layer to be printed and the adhesive layer. 
     
     
       8. A label having a heat transfer pattern comprising a heat fixing ink comprising a polyolefin and a colorant on the layer to be printed of the adhesive sheet for printing according to claim 7. 
     
     
       9. The adhesive sheet for printing according to claim 7, wherein the viscoelastic material layer has a complex rigidity of 10 4  to 10 7  dynes/cm 2  at room temperature at a frequency of 1 Hz. 
     
     
       10. A label having a heat transfer pattern comprising a heat fixing ink comprising a polyolefin and a colorant on the layer to be printed of the adhesive sheet for printing according to claim 9. 
     
     
       11. A label having a heat transfer pattern comprising a heat fixing ink comprising a polyolefin and a colorant on the layer to be printed of the adhesive sheet for printing according to claim 6. 
     
     
       12. A label having a heat transfer pattern comprising a heat fixing ink comprising a polyolefin and a colorant on the layer to be printed of the adhesive sheet for printing according to any one of claims 1.